Dynamic Characteristics of a Gear train System with Softly Supported Shafts

Abstract

Coupled torsional-lateral vibration of softly supported shafts in a spur geared system is investigated. Taking torsional flexibility and bearing stiffness into consideration, dynamic characteristics of a countershaft in a geared system are discussed. It is shown in this paper that the dynamic characteristics of a countershaft are affected not only by the angle between the two power transmitting directions on the shaft but also by the angle between power transmitting direction and elastic principle axis of the support. In this study, the relationships between these factors and dynamic characteristics including natural frequencies are discussed numerically and experimentally.